DTC Logic

Diagnosis Procedure
1.CHECK USB HARNESS
Visually check USB harness.
U1243 display unit
U1255 satellite radio tunerAudio system
Symptom Table
AUDIO SYSTEM
RELATED TO HANDS-FREE PHONE
Before performing diagnosis, confirm that the cellular phone being
used by the customer is compatible with
the vehicle.
It is possible that a malfunction is occurring due to a version
change of the phone even tho ...
Power supply and ground circuit
CLIMATE CONTROLLED SEAT CONTROL UNIT
CLIMATE CONTROLLED SEAT CONTROL UNIT : Diagnosis Procedure
Regarding Wiring Diagram information, refer to SE-44, "Wiring Diagram".
1.CHECK FUSES
2.CHECK BATTERY POWER SUPPLY CIRCUIT
Turn ignition switch OFF.
Disconnect climate controlled seat control ...
B260A ignition relay
Description
BCM turns ON the following relays to ignition power supply to each ECU when
the ignition switch is turned
ON.
Ignition relay-1 (inside IPDM E/R)
Ignition relay-2 (inside fuse block (J/B))
Front blower motor relay
BCM checks any ignition relay ON request for consistency wi ...